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- Title
Composition of nifH in a wastewater treatment system reliant on N<sub>2</sub> fixation.
- Authors
Bowers, T.; Reid, N.; Lloyd-Jones, G.
- Abstract
High levels of nitrogen fixation have been observed in the wastewaters of pulp and paper mills. In this study, we show that nitrogen fixation in a model pulp and paper wastewater treatment system is supported by a high density of nifH sequences that are of low diversity. Quantitative PCR revealed a ratio of nifH to 16S rDNA of 1.14 ± 0.76 which shows that very high levels of the nifH gene were enriched to support the high rates of nitrogen fixation that occur in this wastewater. Changes in wastewater composition and dissolved oxygen levels did not affect the nifH levels and allowed stable wastewater treatment. The nifH sequences identified display a similar profile to those seen in forest soil environments where nifH sequences derived from α- proteobacteria and β- proteobacteria are also prevalent.
- Subjects
WASTEWATER treatment; NITROGEN fixation; INDUSTRIAL wastes; SEWAGE purification; FOREST soils; WOOD pulp industry; BIOCHEMICAL oxygen demand; PHYLOGENY; NUCLEIC acid hybridization
- Publication
Applied Microbiology & Biotechnology, 2008, Vol 79, Issue 5, p811
- ISSN
0175-7598
- Publication type
Article
- DOI
10.1007/s00253-008-1486-2